The output of my F-1X is very low. I've followed the advice (jack-cersizing and cleaning) in the Must Reads/FAQ to no avail. When I A/B it (for comparison) with the A channel of my F2-B with identical settings, the output is signifantly lower. Even at full volume, the output is not sufficient. I normally run the F-1X to a QSC PLX1202 (bridged) and an SF-2 thru the effects loop.

John. I had a similar problem with my Eden Navigator. It turned out to be fried transistors in the output circuit caused by someone putting phantom power through the DI. Just one of many possibilities.